Estimating bearing angles by encoding ultrasonic transmissions at different frequencies
IEEE Instrumentation and Measurement Technology Conference(2009)
摘要
One of the main drawbacks of ultrasonic transducers is the difficulty to determine the bearing angle of echoes coming from an obstacle placed in front. Echoes often provide only the distance to the reflector inside the emission cone of the transducer, so some applications associate several transducers with the same scanning area to obtain more information about the common reflectors. This work proposes the use of encoded transmissions along a large bandwidth in order to estimate the bearing angle of echoes with only one transducer, even in cases with low signal-to-noise ratios.
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关键词
ultrasonic transducers,encoding transmissions,ultrasonic signal procesing,frequency analysis
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